Files with jpk extension can be also found as files recorded using the JPK Instruments AG devices. Most likely graphics.
There is one other file type using
the JPK file extension!
.jpk - Dark Blood Online game data
JPK file extension - JPK Instruments file format
What is jpk file? How to open jpk files?
File type specification:
File extension jpk appears to be mainly related to specialized format used in applications provided by JPK Instruments, a company that develops microscopy solutions.
A .jpk file stores some kind of data captured from JPK instruments devices.
This jpk file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.